The patch introduces the alternative configuration of the log buffer for the lwmon5 board: the storage for the log-buffer itself is OCM(on-chip memory), the log-buffer header is moved to six GPT registers (PPC440EPX_GPT0_COMP1, ..., PPC440EPX_GPT0_COMP5).
To enable this, alternative, configuration the U-Boot board configuration
file for lwmon5 includes the definitions of alternative addresses for header
(CONFIG_ALT_LH_ADDR) and buffer (CONFIG_ALT_LB_ADDR).
The Linux shall be configured with the CONFIG_ALT_LB_LOCATION option set,
and has the BOARD_ALT_LH_ADDR and BOARD_ALT_LB_ADDR constants defined in the
lwmon5 board-specific header (arch/ppc/platforms/4xx/lwmon5.h).
Signed-off-by: Yuri Tikhonov <yur@emcraft.com>
diff --git a/lib_ppc/board.c b/lib_ppc/board.c
index fbf1c5d..ee0213e 100644
--- a/lib_ppc/board.c
+++ b/lib_ppc/board.c
@@ -436,10 +436,12 @@
addr = CFG_SDRAM_BASE + get_effective_memsize();
#ifdef CONFIG_LOGBUFFER
+#ifndef CONFIG_ALT_LB_ADDR
/* reserve kernel log buffer */
addr -= (LOGBUFF_RESERVE);
debug ("Reserving %dk for kernel logbuffer at %08lx\n", LOGBUFF_LEN, addr);
#endif
+#endif
#ifdef CONFIG_PRAM
/*
@@ -1126,9 +1128,11 @@
pram=0;
#endif
#ifdef CONFIG_LOGBUFFER
+#ifndef CONFIG_ALT_LB_ADDR
/* Also take the logbuffer into account (pram is in kB) */
pram += (LOGBUFF_LEN+LOGBUFF_OVERHEAD)/1024;
#endif
+#endif
sprintf ((char *)memsz, "%ldk", (bd->bi_memsize / 1024) - pram);
setenv ("mem", (char *)memsz);
}
